Warp stop-motion.



J. REGAN.

WARP STOP MOTION.

APPLICATION mm mm. 19w.

Patented May 7, 1918.

2 SHEETS-*SHEET I.

J. REGAN.

WARP STOP MOTION.

APPLICATION HLED APR. 6. 191?.

Patented May 7, 1918.

2 SHEETSSHEET 2- UNITED STATES'PATENT OFFICE.

JOHN REG-LN, OF NEW BEDFORD, MASSACHUSETTS, ASSIGNOR TO CROHP'IOH &KNOWLES LOOK WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHU- BETTE.

WARP STOP-MOTION.

Specification of Letters Patent.

Patented May 7, 1918.

Application filed April 6, 1917. Serial No. 160,276.

To all whom it may concern:

Be it known that I, JOHN REGAN, a citizen of the United States, residingat New Bedford, in the county of Bristol and State of Massachusetts,have invented a new and useful Warp Stop-Motion, of which the followingis a speci cation.

This invention relates to a Warp stop motion of the type in-which afallen dro wire renders certain mechanical devices e fective to stop theloom.

Warpstop motions of this general type are in very common use and asusually built comprise a vibrator bar having an oscillating movementbeneath the drop wires. The vi rator is mounted to swing as close aspossible to a second bar fixed to the frame of the sto motion. When adrop wire is released y the breaking of a war thread it falls betweenthe vibrator bar an the second or fixed bar, and thus prevents movementof the vibrator bar past and beneath the fixed bar. 'Such interferencewith the free movement of the vibrator bar causes the stopping of theloom. For coarse work the results i are reasonably satisfactory, but onvery fine work for which the drop wires are necessarily made ofextremely thin stock it is found that a stop motion of this type must bemade with extreme accuracy in order to be reliable. Unless the vibratorbar swings as close as possible beneath the fixed bar, the very thin andflexible drop wires will bend and slip between the vibrator and thefixed bar without stoppin the loom. a

It is the general 0 ject of my invention to avoid such necessity forextreme accuracy by providing a warp stop motion in which the loomstopping mechanism is rendered eflective by the direct cooperation of afallen dro wire with an actuator, preferably exten ing through anopening in the drop wire, such coiiperation being independent of'therelation of the actuator to any other part of the stop motion.

In the preferred form of my invention the opening in the drop wire isformed with wide and narrow portions, and the actuator is in the form ofa rod of non-circular cross section extending through the openings inthe drop wires and normally oscillating freely therein. Upon the fallingof 'a drop of the opening in the fallen wire engages 'vided with an rod.and its oscillation is thereby prevented. This construction is found tobe extremely reliable in operation and does not require any specialaccuracy in the making of the parts of the stop motion.

My invention further relates to certain arrangements and combinations ofparts which will be hereinafter described and more articularly pointedout in the appended claims.

A pre erred form of my invention is shown in the drawings, in which-Figure 1 is an end elevation of my improved stop motion;

Fig. 2 is a partial front elevation of the parts shown in Fig. 1 v

Figs. 3 and 4 are diagrammatic end elevations showing the operation ofthe parts under different conditions;

Fig. 5 shows the relative position of the drop wire and actuator undernormal conditions, and

Fig. 6 shows the relative position which the drop wire and actuatorassume upon the breaking of a warp thread.

In Figs. 1 and 2 I have shown the operative end of a warp stop motion,including the mechanism for angular] tor rods. mounted upon a frame 10adjustab'ly secured to a rod 11 fixed to the loom side (not shown). Theframe 10 is connected by bars 12 to a similar frame at the opposite sideof the loom. The bars" 12 are separated sufficiently to permit the dropwires 13 to swing freely between them, the stop motion shown in thedrawings being arranged with two sets or banks of wires 13 and requiringthree bars 12.

The wires 13 may be of. different welllmown styles in accordance withthe particular class ofgoods upon which they are to be used, the wireshown in the drawing being slotted at its lower end and being proopening14 in its upper end y moving the actuaformed with a wide row portion 14.

Each bank of wires 13 cooperates with an actuating rod 15 which extendsthrough the wide portion 14 of the drop wires when they are 1n normalposition. The rod 15 is of non-circular cross section and each end ofthe rod is referably supportedin a circular bearing block 16. The block16 at the operative end of the stop motion shown in portion 14 and anar- The actuating mechanism is left to the between the sides 0 stud 24fixed pivot Figs. 1 and 2 is provided with a downwardly extending arm 17having a stud or promotion 18 at its lower end. a The bearing blocks 16are secured in position by a plate 20 (Fig. 1) pivoted at 21 to theframe 10 and being normally positioned by a stop 22 so that the lowerpprtion of t e plate 20 covers the bearing locks 16, retaining them inthe frame 10 and reventing the longitudinal removal or disp acement ofthe rods 15. When it is desired to remove either of the actuatinglrodsthe plate 20 is swung u ward and to t e right in Fig. 1 to uncover t eends of the rods.

A link 23 is mounted on the studs 18 at the lower ends of the arms 17,said link be ng itself provided with a stud 24 extendm outwardly intoposition to engage a slotte lever 25. The lever 25 is pivoted on a stu26 carried by an arm 27 which in turn swings on a pivot 28 fixed to theframe 10. he lever 25 extends upwardly beyond the stud 26 and at itsupper end is provided with a stud 30 upon w link 31 through anismiscontro e 7 Thcarm 2'1 is regularly oscillated through an actuatinglink 32 by which the arm is connected to actuating mechanism not shown.The arm 27 also supports a spring plunger 83 engaging the lever 25 and bwhich the lever is r tained yieldingly-"in he position shown in Fig. 1.For a complete description of the actuating mechanism, reference is madeto the patent to'Wyman, No. 665,713, issued January 8, 1901.

Under normal conditions the slotted lever 25 moves in unison with thearm the ivot 28 as a center, swinging t e link 23, t e studs 18 and armsdotted line ositions shown in Fi 3, and thereby osci ating the actuatorro' s 15 about the axes of the circular bear-' ing blocks 16. This freeoscillation of the actuator rods will continue so long ast e wires arein the ra' position shown in Fig. 5. p a a When one of the warp threadsbreaks the corresponding drop wire fallsto the position Fig. 6, en theactuator the narrow portion 14" of the opening: en position, furt eroscillation of the rod becomes impossible and accordingly 17, the studs18 and link 23 are sition shown in Fig. 4, thus causing the on the link23 to act thereafter as a for the slotted lever 25, which thereafterswings about the pivot 24 moves the link 31 to the right or left to oneof the dotted line ositions shown in 4. Such movement ofthis link ineither 1- rection places th eld in the e knock-ofi mechanism inoperation to stop the loom.

While the angular movement of the actuw 27 about V freely movabletherein, 17 to the right and the wire is in this the arms tor is hereinshown as an oscillatory movement, my invention is not limited to anyparticular form 0 an lar -movement, as a continuous or intermittentangular movement in a, single direction is equa y adapted to thepurposes herein described.

Having thus described my invention the simplicity and advantages thereofwill be apparent. It will be particularly noted that the-loom is stoppeddirect coiiperation of the fallen drop wire with the actuator rod, andthat it is not dependent in any way upon the relative position oradjustment of other parts. It will be also noted that the cross sectionvof the rod '15 may be varied as desired provided only hat anon-circular cross section be' used.

It should be noted 4 above the warp threads while is not essential. Withcertain oods the opening 14 and actuator rods 15 will preferably be atthe upper end of the dro wires an above the-warp, as

while with difierent be found desirable position the actuator rods belowthe warp threads.

It will be also evident that other changes and modifications can be madein my 1111- proved stopmotion without departing 50m the spirit and scopeoi my invention as set forth in the claims, and I do not wish to beotherwise limited to the details herein disclosed, but what I claim is1- 1. A we stop nation, a p urality ing an opening therein, an actuatorextending through said openings and normally means to give said actuatoroperative oscillatory movements in two directions, and means to stop theloom when the movement of said actuator in either direction isprevented, each drop wire when unsupported by a-warp thread beingeffective to prevent movement of said aci ii i 1 warp s motion comprisina p urality of, drop wii'es each g having an opening therein formed withwide and narrow portions metrically disposed, an actuator ofnon-circular cross section extending through said openings at the wideportion when t e drop wires are in normal osition, said tuator beingfreely mova la in said iwid portion of said openin but being herommovementwhenint enarrow port the openi-n in a fallen drop wire byengagement with the two opposed sides of the openin at said narrowportion, means to move said actuator, and means to stop the loom whenthe movement of said actuator is prevented.

3. A warp stop motion comprising a plurality of drop wires each havingan opening therein-with a wide lower portion and a narthat the locationof the A row upper portion symmetrically disposed, permitting suchremoval when said device a sing erod of non-clrcnlar cross section exismoved rom normal position. tendin freely through said wide lower por- 5.A warp stop motion comprising drop tion 01 said openings when the wiresare in wires arranged in a plurality of sets, eac

5 normal position, means to oscillate said rod drop wire having an irrelar opening 25 continuously, said rod being free to osciltherein, anactuator rod 0 non-circular late when in said wide portion but beingcross section extending through the openheld by the drop wire frommovement in ings in each set of drop wires, circular beareitherdirection when in the narrow portion ing blocks for each actuator rod,bearin 0 of the opening in a fallen drop wire, and for said blocks, armsconnected to sald 30 means to stop the loom when said rod is blocks, alink connecting said arms, and acheld from oscillation. tuatingmechanism for moving said link,

4. A warp stop motion comprising an 110- said rods and link being heldfrom movetuator rod of non-circular cross section, oirment by a fallendrop wire and said actuat- 15 cnlar bearing blocks supportin the ends ofing mechanism being thereby rendered ef- 35 said rod, bearings for saidb ocks, means fective to stop the loom. connected to one of said blocksto oscillate In testimony whereof I have hereunto afsaid blocks and rod,and a movable device fixed my signature. :efiective to normall neventlongitudinal 2o removal of said rod 111 said blocks but JOHN REGAN.

